package danlimoshi;

public class SingerTest1 {
    private SingerTest1() { //防止外部去new对象

    }

    private static SingerTest1 singerTest = null;
    public static SingerTest1 getInstance() {
        if (singerTest == null) {
            return singerTest = new SingerTest1();
        }
        return singerTest;
    }
}
